freeman



No. 607,794. Patented luly l9, I898. W. P. FREEMAN.

APPARATUS FOR CLEANING PAINT FROI SHIPS.

(Appliution 11nd June 22, 1897.) (No Model.) 4 Sheets$heat I.

m5 mums PETER$ co, Pumuumu, WASHINGTON, u c

No. 607,794. Patented July l9, I898. W. P. FREEMAN.

APPARATUS FOR CLEANING PAINT FROM SHIPS.

(Auuliution filed June 22, 1897,) (N0 Model.) 4 Sheets-Sheet 2.

lllllll "II No. 607,794. Patented Iuly l9, I898. W. P. FREEMAN.

APPARATUS FOR CLEANING PAINT FROM SHIPS.

(Application filed June 22, 1897.) (No Model.) 4 Sheets-Sheet 3.

No. 607,794. Patented luly l9, I898. W. P. FREEMAN.

APPARATUS FOR CLEANING PAINT FROM SHIPS.

(Lpplicltion filed June 95, 1897.) (No Model.) 4 Sheets-8heet 4.

' UNITED STATES I PATENT OF ICE.

\VARREN P. FREEMAN, OF NEXV YORK, N. Y.

Y APPARATUS FOR CLEANING PAINT FROM SHIPS.

SPECIFICATION forming part of Letters Patent No. 607,794, dated July 19,1898.

Application filed June 22 1897. Serial No. 641,806. (No model.)

To ctZZ whom it may concern.-

Be it known that LWAnnEN P. FREEMAN, of the city and State of New York,have invented certain new and useful Improvements in Apparatus forCleaning Paint from Ships and other Uses, of which the following is adescription, referring to the accompanying drawings,which form a part ofthis specification.

The object of the invention is to give to a suitably-supported tool'arapid reciprocating motion, so as to cause the tool to give a successionof blows suitable for cleaning the old paint from the plates of ironships and suitable also for many other purposes, such as cleaning paintfrom iron,wood, and stone surfaces, dressing stone, and otherwisetreating regular or irregular surfaces bya rapidly-reciprocatin g toolhaving a proper edge or working end.

My invention will be fully understood from a description of theaccompanying drawings, which illustrate one preferred embodiment of itas arranged for cleaning the paint from ships plates and for a number ofother uses.

In the accompanying drawings, Figure l is a front elevation of theinstrument itself disconnected from the crane or other apparatus fromwhich it may be suspended. Fig. 2 is a side elevation with the casingfor one of the commutators and brushes removed and the casing whichcovers part of the raising and lowering mechanism shown in section.-Fig. 3 is a plan view of the same apparatus. Fig. l is a plan view withthe raising and lowering mechanism and handles and certain superposedparts removed and one of the com mutators exposed by showing its casingin section. Fig. 5 is a detail view of parts of the actuating mechanismfor the reciprocating tool-holder, showim the tool also. Figs. 6 and '7are detail vie\ 's of one form of electric switch in the open and closedpositions, respectively. Fig. Sis a view of the counterbalance-spring ofthe raising and lowering mechanism. Fig. 9 shows my complete apparatusin its preferredforni and mounting ready for use. Fig. 10 is an end viewof the trolley.

Throughout the drawings like letters of ref erence indicate like parts.

For convenience of description I will begin with the description of themovement and mounting of the tool which cleans or dresses the surface ofthe ships plate or other body.

In the drawings the tool is shown at 13 provided with an edge suitablefor cleaning off paint or for dressing stone and other surfaces. Thetool is mounted in the reciprocating bar or holder 0 and may be allowedsome end play in the holder, the stiff spring 0 being interposed behindthe tool. This spring serves to take some of the shock off the electricmotor which drives the tool, and in almost all cases I have found theuse of such spring advantageous to the working of the tool. Thereciprocatin g bar C extends lengthwise through the supporting ironcasing D, as shown in the figures. The casing D forms a part of themagnetic circuit of the actuating-motor, as will be presently described.

At E is shown the transverse shaft of the electric motor. This shaft isprovided at its center with an eccentric F, which runs in aneccentric-box G. The box G slides in the transverse ways 0, provided forit in the bar C, as shown in Fig. 5. The rotation of the shaft Etherefore causes harmonic reciprocating movement of the bar 0 and tool13, cansing the tool to strike a rapid succession of blows when broughtagainst the painted or other surface to be acted upon.

The field-magnets of the electric motor form the main frame of themachine. The pole-pieces I have lettered N and S, respecti vely. Thereare two sets of pole-pieces, and they are placed so as to act on the twobipolar armatures II, which are mounted upon the transverse shaft E inbearings 72 )laced at the neutral points in the split yoke D of thefield-magnet. Around the two ends of this double or split yoke D arewound the field-magnet coils J. The N and S poles of the field-magnetextend around the respective coils at the end'and on two sides, so thattwo separate field-magnetic circuits are produced, one through thecoils, pole-pieces, and one armature, the other circuit through thecoils and the other pole-pieces and other armature. The object individing the yoke I) is to make the apparatus symmetrical about theaxial line of the reciprocating bar or tool-holder O, the eccentric Fbeing placed at the center, as I have already said. Each leased it wouldtend to rise.

armature is provided with a commutator K and brushes L, which may beinclosed by casings M. The electric motor may be completely cased in bymeans of these casings and the plates M above and below. In Fig. 4 theplate M is removed, the screw-holes by which it is secured to the magnetbeing shown. It will be seen that the reciprocating bar 0 extendsaxially through and is mounted in the field-magnet, so as to reciprocatethrough it. The armatures, the bearings, and the other parts are allsymmetrically arranged relatively to the reciprocating bar 0.

The electric circuits of the motor, which is shown as of the shunt type,are diagrammatically indicated in Fig. 4, the circuit startin g from thetwo black points at the left of the figure. This circuit is controlledbya switch, which may consist of a movable springplate 0 and contact 0,actuated by the retary knob O, which turns the rectangular block 0,provided with pins 0. These pins 0 act upon the spring contact-plates Oand cause it to make or break contact with the plate 0. A spring 0",pressing against the rectangular block 0, holds the parts in positionwhen the handle 0 is released. This switch, or one of any other suitabletype, is introduced to make or break the circuit of the electric motor.The current is led to and from the apparatus by means of the twoconductors P, which are wound upon a springdrum P. Connections are madewith the respective conductors P by means of the contact-plates Q, whichrest in contact with metallic portions of the rotary drum P. Thesemetallic portions are connected with the ends of the respectiveconductors P, so that the current can flow between the conductors andthe fixed plates Q. The plates Q are connected with the circuits of themotor, one directly and the other through the switch, so that when theswitch is closed the current flows from one contact Q, through theswitch and motor, back through the other contact and conductor P.

The drum P is mounted on the transverse shaft between the two bracketsR. The conductors P are guided onto the drum by means of the twoguide-rolls R. A spring S, inclosed in a casing S, acts upon thedrumshaft to cause it to wind up the conductors P, and thereby supportthe whole instrument by means of the conductors P. The spring shouldexert a tension a little greater than the weight of the apparatus, sothat when re- The drum is held from turning by means of the springpawlT, as shown in Fig. 2, which engages the ratchet T on one end of theshaft of the drum. The pawl T is provided with a projecting end t, whichis in position to be readily accessible to the thumb of the operatorsright hand when he grasps the handles V of the instrument. By depressingthe pawl the instrument may be raised and lowered and the pawl thenreleased to hold it in position.

The handle O of the controlling-switch is in position to be operated bythe thumb and forefinger of the left hand grasping the lefthand handleV.

In Figs. 9 and 10 I show my preferred way of suspending the instrument.A crane or swinging arm Wis pivotally mounted in suitment is suspended,will supplycurrent to the actuating-motor. The crane IV, swingingeasily, permits the lateral adjustl'nent of the instrument. The trolleyrolling upon the track 20 permits the forward and backward adjustment ofthe instrument, and the springdrum P and conductors P permit theconvenient vertical adjustment of the instrument. The conductors P beingflexible, the edge or operating end of the tool may be directed in anydesired angle and applied to the work with the greatest freedom.

The operation of my device is as follows: Grasping the two handles V,the instrument is brought opposite the point of the ships plates orother surface to be treated, the crane swinging and the trolley ad justin g itself automatically. By pressing the projection 25 the pawl Treleases the ratchet, and the instrument is elevated or lowered to theright point. Thereupon the switch is turned and the tool set going andits working end pressed against the surface to be treated at the desiredangle. As the work proceeds the instrument is raised, lowered, orotherwise adjusted at will, and when the work is finished it may beallowed to rise up out of the way,

the pawl T holding it at any desired height.

In some respects the present invention forms an improvement upon thesubject-matter of Letters Patent No. 545,923, granted to E. T. Thomasand others September 10, 1895, and in other respects a wide departuretherefrom, and I refer to that patent as being closely related to myinvention and as illustrating less perfected forms of similar apparatus,the defects of which I have sought to overcome.

By the term tool as used in the follow ing claims, unless speciallyrestricted to the cutting end or tool proper, B, I do not mean toexclude other parts not named which may be necessary to either themounting or the operation of the tool proper. Indeed all the suspendedparts, whatever they may be, constitute the tool or instrument as awhole just as my apparatus in its most complete form includes the crane;but I do not mean to include in the several claims any parts notnecessarily implied by the terms of each claim.

\Vhat I claim is- 1. In combination, the reciprocating tool, theelectric motor for operating it, flexible connections by which the toolis suspended, means for carrying the current to the said electric motor,and mechanical means for adjusting the tool vertically, laterally, andforward and backward, consisting of a crane provided with a trolleyrunning upon the crane, and a take-up device for the flexibleconnections which support the said tool, substantially as set forth.

2. In combination, the crane, the trolley running upon the crane,electric conductors P extending down from the said trolley, elec; tricconnections between the said trolley and stationary conductors, and theelectricallyoperated tool suspended by means of the said conductors I,substantially as set forth.

3. In combination, the crane, the trolley running upon the crane,electric conductors I extending down from the said trolley, electricconnections between the said trolley and stationary conductors, thereciprocating tool provided with supporting-handles, the electric motorfor operating the said tool, the drum I" upon which the said conductorsI are wound, the said drum being mounted upon the said electric motor,and means for winding up the said conductors upon the said drum orunwinding them, substantially as set forth.

it. In combination, the reciprocating tool, the electric motor therefor,the electric conductors I for the said motor, means for winding andtaking up or unwinding and letting out the said conductors 1 adjacent tothe said motor, and a switch mounted in fixed relation to the said motorfor controlling it, substantially as set forth.

5. In combination with the electrically-actuated tool and the casing orframe thereof, a drum mounted upon the said casing or frame, theconductors I arranged to be wound upon the said drum, acounterbalancespring for the said drum, to counterbalance the weight ofthe tool and its connected parts when suspended by means of the saidconductors, and means for locking and releasing the said drum,substantially as set forth.

6. In combination, the electricallyoperated tool the electric conductorstherefor, a drum mounted upon the casing or frame of the said tool, theends of the said conductors being secured to the said drum andrespectively connected to the terminals of the electric motor bycontacts or brushes Q bearing upon metallic portions of the said drum,to which the ends of the said conductors are electrically connected,substantially as set forth.

7. In combination, the reciprocating tool actuated by the transverseshaft, two armatures mounted coaxially upon either side of the said tooland upon the said shaft, and the field-magnets, commutator-brushes, andelectrical connections, therefor, substantially as set forth.

8. In combination, the electric motor provided with twocoaxially-rotating armatures, the reciprocating tool actuated by theshaft of the said armatures and symmetrically placed between the twosaid armatures, and the 001m mutator and electric connections for thesaid motor, the whole being arranged symmetrically to the said tool,substantially as and for the purposes set forth.

0. In combination with the electric motor, including a field-magnet anda pair of armatures, the reciprocating tool-bar extending through thesaid field-magnet and through the field-magnet windings, the saidtool-bar being actuated by the shaft of the said motor, substantially asset forth.

10. In combination, the reciprocating toolbar and the electric motortherefor, the said tool-bar extending transversely to the shaft of thesaid motor, through the field-magnet and field-magnet coils,substantially as set forth.

11. In combination, the reciprocating tool, comprising the holder or bar0, the eccentric box G sliding transversely to the said bar or holderand mounted therein in guides, the eccentric I turning in the said boxG, the shaft E, means for rotating the said shaft, and the guides forthe said bar or holder 0, substandaily as set forth.

12. In combination with the reciprocating tool bar or holder, theelectric motor actuat ing the said reciprocating tool bar or holder, anda tool end or tool proper movably secured to the said reciprocating toolbar or holder, and a spring interposed between the said tool end or toolproper and the said reciprocating tool bar or holder, substantially asset forth.

In testimony whereof I have hereunto set my hand this 17th day of June,1807.

\VARREN I. FREEMAN. lVitnesses:

Gnonun II. Sousa-noun, HAROLD BINNuv.

